The increased uncertainty around the future of Britain outside the bloc will slow down business investment and consumer spending, as companies prefer to stay away from hiring and long-term investment, according to the agency.

“Our baseline assumes that some fiscal loosening and monetary policy accommodation will support the economy, limiting the deceleration of growth,” the agency concludes.

Moody’s analysts expect a material correction in asset prices, a house price downturn or a large decline in consumption put the UK’s economic growth at risk.

“At the same time, the fall in sterling will mitigate some of the negative effect in the short-term by providing a boost to exports,” Moody’s says.

The experts stressed the direct impact on growth in the EU will be less significant owing to its limited exposure to direct economic and trade links.

Some 48 percent of British exports go to Europe, but only seven percent of EU exports are destined for the UK.

“Downside risks to global growth stem not from the possibility of a recession in the UK, but from the possibility that developments in the UK may give rise to increased political risk elsewhere in the EU,” the agency warns.